Set `REALM_HAVE_CONFIG` when building core.
Set `REALM_HAVE_CONFIG` when building core.

Object store and the bindings always require that core be built with it set.

realm/realm-core,realm/realm-object-store,realm/realm-core,realm/realm-object-store,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-object-store